Max Planck was the German physicist, the founder of quantum physics. Works of Planck devoted to thermodynamics, theory of thermal radiation, the quantum theory of special relativity, optics. A raw of works devoted to the Planck historical, methodological and philosophical aspects of science.
People were interested in the development of the newest branch of electrodynamics, the mechanics of electrons. All discovers at that sphere led to the technical breakthrough in many spheres of science. Read this book till the end to know more about it!